Heat and Mass Transfer The unit of overall coefficient of heat transfer is kcal/m hr °C kcal/m² kcal/hr °C kcal/m² hr °C kcal/m hr °C kcal/m² kcal/hr °C kcal/m² hr °C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body) (dT/dx) k. (dx/dT) k. k. (dx/dT) k. (dT/dx) (dT/dx) k. (dx/dT) k. k. (dx/dT) k. (dT/dx) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be One Two Four Three One Two Four Three ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The radiation emitted by a black body is known as All of these Full radiation Total radiation Black radiation All of these Full radiation Total radiation Black radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Joule sec is the unit of Thermal conductivity Kinematic viscosity Universal gas constant Planck's constant Thermal conductivity Kinematic viscosity Universal gas constant Planck's constant ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS